Twist head mold and twist head apparatus

Abstract

This invention belongs to the field of stator winding technology and discloses a twisting mold and twisting equipment. The stator winding that has been wound and is to be twisted is fixed by a clamping device. Then, the twisting mold is controlled to move closer to the stator winding and press against the bottom wall of the insertion slot, so that the ends of multiple pins of the stator winding that need to be twisted are inserted into multiple twisting slots one by one. Then, the twisting mold is controlled to rotate in the first circumferential direction and move away from the stator winding. During this process, the ends of the pins are gradually bent under the action of the connecting inner wall, and the ends of the pins of the stator winding gradually leave the insertion slot. After the ends of the pins leave the insertion slot, as the twisting mold continues to rotate and move away from the stator winding, the ends of the pins continue to bend under the action of the twisting inner wall until the ends of the pins of the stator winding leave the twisting mold, so that the stator winding forms an X-pin winding.

Description

Technical Field

[0001] This invention relates to the field of motor design technology, and in particular to a torsion head mold and torsion head device. Background Technology

[0002] Electric drive systems are the main power units of new energy vehicles. Currently, drive motors are required to have higher specific power, lower losses, smaller stator end size, and be easier to arrange on the vehicle. Due to the special end structure of X-Pin windings, motors using X-Pin windings are better able to meet the requirements of new energy vehicles for drive motors.

[0003] The end structure of the X-pin winding eliminates the flattening process used in the manufacturing of the U-pin winding. This results in no straight segment to clamp the X-pin winding during twisting, significantly increasing the difficulty of the twisting process. Using the same twisting fixture as a standard U-pin winding for twisting the X-pin winding leads to lower end forming accuracy and lower welding yield. Summary of the Invention

[0004] The purpose of this invention is to provide a twisting mold and twisting device, which can improve the forming accuracy of twisting the wires of X-pin windings, thereby increasing the pass rate of motors using X-pin windings.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A twisting head mold includes a twisting head body. The end face of one axial end of the twisting head body is a first end face. The first end face is provided with a plurality of twisting head grooves arranged circumferentially. The twisting head groove has a first inner sidewall and a second inner sidewall arranged opposite to each other along the circumference of the twisting head body. The second inner sidewall includes an embedded inner wall, a connecting inner wall and a twisting inner wall connected in sequence.

[0007] The end of the embedded inner wall away from the connecting inner wall is connected to the bottom wall of the twisting groove, so that an embedded groove is formed between the embedded inner wall and the first inner side wall; the connecting inner wall is parallel to the first end face, and the end of the twisting inner wall away from the connecting inner wall is connected to the first end face.

[0008] From the bottom wall of the twisting groove to the opening of the twisting groove, the inner wall of the twisting groove gradually moves away from the first inner wall.

[0009] As one possible implementation of the aforementioned twisting head mold, the width of the twisting head groove along the radial direction of the twisting head body is W. wid W wid =T wir +D gap , among which, T wirD represents the thickness of the conductor wound around the stator winding. gap This indicates a reserved gap, 0.2mm≤D gap ≤0.3mm.

[0010] As one possible implementation of the aforementioned torsion head mold, the length of the embedded inner wall along the axial direction of the torsion head body is DE. tro Among them, DE tro =W wir / 2(cos(α / 2)-tan(α / 2)), where, W wir The width of the conductor wound around the stator winding is represented by α, and the tip angle of the conductor is represented by α.

[0011] As one possible implementation of the aforementioned twisting head mold, the distance between the first inner sidewall and the embedded inner wall is W. tro W tro =W wir ×cos(α / 2) / 2(cos(α / 2)-tan(α / 2)), where, W wir The width of the conductor wound around the stator winding is represented by α, and the tip angle of the conductor is represented by α.

[0012] As one possible implementation of the aforementioned twisting head mold, the length of the connecting inner wall along the circumferential direction of the twisting head body is D. hor D hor =W wir ×tan(α / 2) / sinα, where, W wir The width of the conductor wound around the stator winding is represented by α, and the tip angle of the conductor is represented by α.

[0013] As one possible implementation of the aforementioned twisting head mold, the included angle between the twisting inner wall and the first end face is β, where β = γ - φ, γ represents the tilt angle of the twisting head of the X-Pin stator winding, and φ represents the over-twist angle.

[0014] As one possible implementation of the above-mentioned twisting head mold, the twisting head body includes a winding forming working part and a mounting part arranged and connected along its own axial direction. The outer diameter of the mounting part is larger than the outer diameter of the winding forming working part. The twisting head body is provided with a central hole that passes through the winding forming working part and the mounting part along its axial direction. The end face of the winding forming working part away from the mounting part forms the first end face.

[0015] The outer diameter of the winding forming working part is D. woro D woro =D win +2D thiw D win D represents the outer diameter of the stator winding. thiwThis indicates the distance between the inner wall of the twisting groove on the side closest to the outer peripheral wall of the winding forming working part and the outer peripheral wall of the winding forming working part, 1.5mm≤D thiw ≤2mm; and / or,

[0016] The main body of the toggle head has a central hole, and a plurality of toggle head grooves are arranged around the outer periphery of the central hole. The inner diameter of the central hole is D. wori D wori =D woro -2 (W) wid +D thiw +D thii ), where D woro W represents the outer diameter of the winding forming working part. thii This indicates the distance between the inner wall of the groove on the side closest to the central axis of the central hole and the inner wall of the central hole, 0.5mm≤D. thii ≤1mm.

[0017] As one possible implementation of the aforementioned toggle mold, the outer diameter of the mounting portion is D. bot D bot =D equ1 D equ1 Indicates the diameter of the mounting interface of the drive unit; and / or,

[0018] The axial length H of the toggle body is 35mm ≤ H ≤ 50mm; and / or,

[0019] The mounting portion has an annular centering portion protruding from the end face away from the winding forming working portion; the outer diameter of the centering portion is D. cen D cen =D equ2 The diameter of the centering hole of the drive device is indicated; and / or, a drive key is protruding from the end face of the centering part away from the winding forming working part, the cross-section of the drive key is non-circular, and the width of the drive key is W. dri W dri =W equ3 W equ3 This indicates the width of the drive keyway of the drive device.

[0020] As one possible implementation of the aforementioned torsion head mold, the mounting part is provided with a plurality of mounting holes that penetrate the torsion head body along its axial direction, and the plurality of mounting holes are arranged at intervals along the circumference of the torsion head body.

[0021] To achieve the above objectives, the present invention also provides a twisting head device, including a twisting head mold provided in any of the above-described embodiments, and a clamping device for clamping the stator core.

[0022] The twisting mold can rotate along a first circumferential direction, which is the direction from the second inner sidewall to the first inner sidewall;

[0023] Alternatively, the clamping device can rotate along a second circumferential direction, which is the direction from the first inner sidewall to the second inner sidewall;

[0024] One of the twisting die and the clamping device is movable along the axial direction of the twisting body.

[0025] The beneficial effects of this invention are:

[0026] The present invention provides a twisting mold and twisting device, which fixes the stator winding that has been wound and is to be twisted by a clamping device, and then controls the twisting mold to move closer to the stator winding and press against the bottom wall of the insertion slot, so that the ends of multiple pins of the stator winding that need to be twisted are inserted into multiple twisting slots one by one. Then, the twisting mold is controlled to rotate in the first circumferential direction and at the same time controlled to move away from the stator winding. During this process, the ends of the pins gradually bend under the action of the connecting inner wall, and the ends of the pins of the stator winding gradually leave the insertion slot. After the ends of the pins leave the insertion slot, as the twisting mold continues to rotate and move further away from the stator winding, the ends of the pins continue to bend under the action of the twisting inner wall until the ends of the pins of the stator winding leave the twisting mold. At this time, the welding end of the stator winding is formed, so that the stator winding forms an X-pin winding. Attached Figure Description

[0027] Figure 1 This is a diagram showing the state in which the ends of multiple pins of the stator winding provided in this embodiment of the invention are inserted one-to-one into the twisting groove of the twisting mold.

[0028] Figure 2 This is a partial schematic diagram of the unfolded twisting head mold provided in an embodiment of the present invention;

[0029] Figure 3 This is a top view of the torsion head mold provided in an embodiment of the present invention;

[0030] Figure 4 This is a partial cross-sectional view of the torsion head mold provided in an embodiment of the present invention;

[0031] Figure 5 This is a cross-sectional view of the conductor provided in an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the wire provided in an embodiment of the present invention;

[0033] Figure 7 This is a side view of the torsion head mold provided in an embodiment of the present invention;

[0034] Figure 8 This is a cross-sectional view of the torsion head mold provided in an embodiment of the present invention.

[0035] In the picture:

[0036] 1. Twisting head body; 11. First end face; 12. Twisting head groove; 121. Embedding groove; 122. First inner side wall; 123. Second inner side wall; 1231. Embedding inner wall; 1232. Connecting inner wall; 1233. Twisting inner wall; 13. Winding forming working part; 14. Mounting part; 141. Mounting hole; 15. Drive key; 16. Center hole; 17. Centering part;

[0037] 100, stator winding; 200, conductor. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0039] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0042] like Figure 1 As shown, an embodiment of the present invention provides a twisting mold for twisting the welding end of the stator winding 100 before welding, so that the welding end forms an X-pin after twisting. By welding welding ends with different X-pin forms, the axial length of the stator winding 100 is reduced.

[0043] like Figures 1 to 3 As shown, the twisting head mold includes a twisting head body 1. The end face of one axial end of the twisting head body 1 is a first end face 11. The first end face 11 is provided with a plurality of twisting head grooves 12 arranged circumferentially. The twisting head groove 12 has a first inner sidewall 122 and a second inner sidewall 123 arranged opposite to each other along the circumference of the twisting head body 1. The second inner sidewall 123 includes an embedded inner wall 1231, a connecting inner wall 1232 and a twisting inner wall 1233 connected in sequence. The end of the embedded inner wall 1231 away from the connecting inner wall 1232 is connected to the bottom wall of the twisting head groove 12, so that an embedded groove 121 is formed between the embedded inner wall 1231 and the first inner sidewall 122. The connecting inner wall 1232 is parallel to the first end face 11. The end of the twisting inner wall 1233 away from the connecting inner wall 1232 is connected to the first end face 11. From the bottom wall of the twisting head groove 12 to the opening of the twisting head groove 12, the twisting inner wall 1233 gradually moves away from the first inner sidewall 122. For example, the embedded inner wall 1231 is parallel to the first inner sidewall 122 and parallel to the axis of the twisting head body 1, and the twisting inner wall 1233 is an inclined plane.

[0044] An embodiment of the present invention also provides a twisting device, including the above-described twisting mold and a clamping device for clamping the stator core. The twisting mold is rotatable along a first circumferential direction, which is the direction from the second inner sidewall 123 to the first inner sidewall 122. One of the twisting mold and the clamping device is axially movable along the twisting body 1.

[0045] As an alternative, the clamping device can also be made to rotate along a second circumferential direction, the first circumferential direction being the direction from the first inner wall 122 to the second inner wall 123.

[0046] Taking the example that the twisting mold can rotate along the first circumference and can be raised and lowered, the process of twisting the wound stator winding 100 to form the welding end using the above-mentioned twisting mold is as follows:

[0047] The stator winding 100, which is wound and ready to be twisted, is fixed by a clamping device. Then, the twisting mold is controlled to move closer to the stator winding 100 and press against the bottom wall of the insertion groove 121, so that the ends of the multiple pins of the stator winding 100 that need to be twisted are inserted into the multiple twisting grooves 12 one by one. Then, the twisting mold is controlled to rotate in the first circumferential direction and move away from the stator winding 100. During this process, the ends of the pins are gradually bent under the action of the connecting inner wall 1232, and the ends of the pins of the stator winding 100 gradually leave the insertion groove 121. After the ends of the pins leave the insertion groove 121, as the twisting mold continues to rotate and move away from the stator winding 100, the ends of the pins continue to bend under the action of the twisting inner wall 1233 until the ends of the pins of the stator winding 100 leave the twisting mold. At this time, the welding end of the stator winding 100 is formed, so that the stator winding 100 forms an X-pin winding.

[0048] Specifically, the torsion head device includes a drive unit, which includes a lifting drive component and a rotating drive component. The output end of the lifting drive component is connected to the mounting end of the rotating drive component, and the output end of the rotating drive component is connected to the torsion head mold. This enables the lifting drive component to drive the rotating drive component to move axially by lifting and lowering, and the rotating drive component to drive the torsion head mold to rotate circumferentially.

[0049] For example, the lifting drive is a cylinder, and the rotating drive is a motor.

[0050] As an alternative, a rotary drive can be used to drive a lifting drive to rotate the twisting mold circumferentially, and the lifting drive can be used to directly drive the twisting mold to move axially.

[0051] In some embodiments, such as Figure 4 and Figure 5 As shown, the width of the torsion groove 12 along the radial direction of the torsion body 1 is W. wid W wid =T wir +D gap , among which, T wir D represents the thickness of the conductor 200 wound around the stator winding 100. gap This indicates a reserved gap, 0.2mm≤D gap ≤0.3mm. At T wir Add D to the base gap The subsequent dimension defines the width W of the twist groove 12 along the radial direction of the twist body 1. wid This facilitates the removal of the pin end from the twisting groove 12 during the twisting process, and also by limiting D gapThe range allows for precise positioning of the pin end at the start of the twisting process, while ensuring easy disengagement of the pin end from the twisting groove 12. This facilitates precise forming of the welding end of the X-pin winding during twisting and improves the yield rate when welding the welding end subsequently.

[0052] It should be noted that D gap Any value within the range of 0.2 mm or greater and 0.3 mm or less can be selected, such as D. gap You can select any value from 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm, and 0.3mm.

[0053] In some embodiments, such as Figure 2 and Figure 6 As shown, the length of the embedded inner wall 1231 along the axial direction of the twisting head body 1 is DE. tro Among them, DE tro =W wir / 2(cos(α / 2)-tan(α / 2)), where, W wir α represents the width of the conductor 200 wound around the stator winding 100, and α represents the tip angle of the conductor 200.

[0054] According to W wir And α determine DE tro This not only ensures that the pin end is stably positioned within the insertion groove 121 when the twisting begins, but also allows the pin end to smoothly exit from the insertion groove 121 after the twisting begins. This not only prevents DE... tro If the pin is too small, the limiting effect on the pin end is weak when the pin begins to twist, which can also prevent DE. tro If the pin is too large, it will affect the smooth disengagement of the pin end from the insertion slot 121 after the head starts to turn.

[0055] In some embodiments, such as Figure 2 and Figure 6 As shown, the distance between the first inner wall 122 and the embedded inner wall 1231 is W. tro W tro =W wir ×cos(α / 2) / 2(cos(α / 2)-tan(α / 2)).

[0056] Through W wir And α determine W tro This ensures that the pin end is stably placed in the embedding groove 121 when the head starts to turn, so as to ensure that the position of the pin end is relatively accurate when the head starts to turn.

[0057] In some embodiments, such as Figure 2 and Figure 6 As shown, the length of the connecting inner wall 1232 along the circumference of the twisting head body 1 is D. hor D hor =W wir ×tan(α / 2) / sinα. (Through W) wir And α determines D hor This ensures that the pin end is stably placed in the embedding groove 121 when the head starts to turn, so as to ensure that the position of the pin end is relatively accurate when the head starts to turn.

[0058] In some embodiments, such as Figure 2 As shown, the angle between the inner torsion wall 1233 and the first end face 11 is β, β = γ - φ, where γ represents the tilt angle of the torsion head of the X-Pin stator winding 100, and φ represents the over-torsion angle.

[0059] By limiting β to γ-φ, the impact of pin springback on the twisting accuracy after the twisting process can be reduced, making the included angle between the welded end after twisting and the first end face 11 closer to γ.

[0060] It should be noted that the over-torsion angle φ is related to the material properties, and the value of the over-torsion angle φ can be determined through repeated experiments, so it will not be specifically limited here.

[0061] In some embodiments, such as Figure 1 , Figure 4 and Figure 7 As shown, the torsion head body 1 includes a winding forming working part 13 and a mounting part 14 arranged and connected along its own axial direction. The torsion head body 1 is provided with a central hole 16 that passes through the winding forming working part 13 and the mounting part 14 along its axial direction. The end face of the winding forming working part 13 away from the mounting part 14 forms a first end face 11.

[0062] The outer diameter of the winding forming working part 13 is D woro D woro =D win +2D thiw D win D represents the outer diameter of the stator winding 100. thiw The distance between the inner wall of the twisting groove 12 on the side closest to the outer peripheral wall of the winding forming working part 13 and the outer peripheral wall of the winding forming working part 13 is 1.5mm≤D. thiw ≤2mm.

[0063] D thiw D can be determined through repeated trials. thiw You can select any value within the range of 1.5mm or greater and 2mm or less, such as D.thiw You can select any value from 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, and 2.0mm.

[0064] According to D win and D thiw Determine D woro This can minimize the amount of materials used in preparing the winding forming working part 13, thereby reducing costs.

[0065] In some embodiments, such as Figure 4 and Figure 8 As shown, the main body 1 of the toggle head has a central hole 16, and a plurality of toggle head grooves 12 surround the outer periphery of the central hole 16. The inner diameter of the central hole 16 is D. wori D wori =D woro -2 (W) wid +D thiw +D thii ), where D woro W represents the outer diameter of the winding forming working part 13. thii This indicates the distance between the inner wall of the twist groove 12 on the side closest to the central axis of the central hole 16 and the inner wall of the central hole 16, 0.5mm≤D thii ≤1mm.

[0066] D thii D can be determined based on actual needs. thii You can select any value within the range of 0.5 mm or greater and 1 mm or less, such as D. thii You can select any value from 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, and 1.0mm.

[0067] According to D woro W wid D thii and D thiw Determine D wori This allows for a more accurate inner diameter of the central hole 16, minimizing the amount of material used in preparing the winding forming workpiece 13 and reducing costs.

[0068] In some embodiments, such as Figure 7 As shown, the outer diameter of the mounting part 14 is D. bot D bot =D equ1 D equ1 This indicates the diameter of the mounting interface of the drive unit. By providing a mounting interface on the drive unit, it is convenient to place the mounting part 14 within the mounting interface and fix the mounting part 14 to the drive unit.

[0069] Specifically, the mounting part 14 is provided with a plurality of mounting holes 141 that penetrate the torsion head body 1 along its axial direction. The plurality of mounting holes 141 are arranged at intervals along the circumference of the torsion head body 1, so as to facilitate the connection of the mounting part 14 to the drive device by fasteners that pass through the mounting holes 141.

[0070] In some embodiments, such as Figure 8 As shown, the axial length of the main body 1 of the torsion head is H, 35mm≤H≤50mm. By limiting H, the structural strength requirements of the torsion head mold are met.

[0071] It should be noted that H can be any value greater than or equal to 35mm and less than or equal to 50mm, such as any value among 35mm, 36mm, 37mm, 38mm, 39mm, 40mm, 41mm, 42mm, 43mm, 44mm, 45mm, 46mm, 47mm, 48mm, 49mm, and 50mm.

[0072] In some embodiments, such as Figure 7 As shown, an annular centering portion 17 protrudes from the end face of the mounting portion 14 away from the winding forming working portion 13; the outer diameter of the centering portion 17 is D. cen D cen =D equ2 This indicates the diameter of the centering hole in the drive unit.

[0073] The twisting head mold is positioned by the insertion and engagement between the centering part 17 and the centering hole on the drive device.

[0074] In some embodiments, such as Figure 7 As shown, a drive key 15 protrudes from the end face of the centering part 17 away from the winding forming working part 13. The cross-section of the drive key 15 is non-circular, and the width of the drive key 15 is W. dri， W dri =W equ3 W equ3 This indicates the width of the drive key 15 slot in the drive device. The drive device can drive the rotating head mold to rotate through the interlocking connection between the drive key 15 and the drive key 15 slot. Furthermore, the connection between the rotating head mold and the drive device is simple and low-cost.

[0075] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A head-turning mold, characterized in that, The device includes a torsion head body (1), and the end face of one axial end of the torsion head body (1) is a first end face (11). The first end face (11) is provided with a plurality of torsion head grooves (12) arranged circumferentially. The torsion head grooves (12) have a first inner sidewall (122) and a second inner sidewall (123) arranged opposite to each other circumferentially along the torsion head body (1). The second inner sidewall (123) includes an embedded inner wall (1231), a connecting inner wall (1232) and a torsion inner wall (1233) connected in sequence. The end of the embedded inner wall (1231) away from the connecting inner wall (1232) is connected to the bottom wall of the twist groove (12), so that an embedded groove (121) is formed between the embedded inner wall (1231) and the first inner side wall (122); the connecting inner wall (1232) is parallel to the first end face (11), and the end of the twist inner wall (1233) away from the connecting inner wall (1232) is connected to the first end face (11); From the bottom wall of the twist groove (12) to the opening of the twist groove (12), the inner twist wall (1233) gradually moves away from the first inner sidewall (122). The embedded inner wall (1231) is parallel to the first inner sidewall (122), and the twisted inner wall (1233) is an inclined plane; The length of the embedded inner wall (1231) along the axial direction of the twisting head body (1) is DE. tro Among them, DE tro =W wir / 2(cos(α / 2)-tan(α / 2)), where W wir The width of the conductor (200) winding around the stator winding (100) is indicated by α, and the tip angle of the conductor (200) is indicated by α. The distance between the first inner sidewall (122) and the embedded inner wall (1231) is W. tro W tro =W wir ×cos(α / 2) / 2(cos(α / 2)-tan(α / 2)), where, W wir The width of the conductor (200) winding around the stator winding (100) is indicated by α, and the tip angle of the conductor (200) is indicated by α. The length of the connecting inner wall (1232) along the circumference of the twisting head body (1) is D. hor D hor =W wir ×tan(α / 2) / sinα, where, W wir The width of the conductor (200) winding around the stator winding (100) is indicated by α, and the tip angle of the conductor (200) is indicated by α. The torsion head body (1) includes a winding forming working part (13) and a mounting part (14) arranged and connected along its own axis. The outer diameter of the mounting part (14) is larger than the outer diameter of the winding forming working part (13). The torsion head body (1) is provided with a central hole (16) that passes through the winding forming working part (13) and the mounting part (14) along its axis. The end face of the winding forming working part (13) away from the mounting part (14) forms the first end face (11). The outer diameter of the winding forming working part (13) is D woro D woro =D win +2D thiw D win D represents the outer diameter of the stator winding (100). thiw The distance between the inner wall of the twisting groove (12) on the side closest to the outer peripheral wall of the winding forming working part (13) and the outer peripheral wall of the winding forming working part (13) is 1.5mm≤D. thiw ≤2mm; and / or, The main body (1) of the toggle head is provided with a central hole (16), and a plurality of toggle head grooves (12) are arranged around the outer periphery of the central hole (16). The inner diameter of the central hole (16) is D. wori D wori =D woro -2 (W) wid +D thiw +D thii ), where D woro W represents the outer diameter of the winding forming working part (13). thii This indicates the distance between the inner wall of the twist groove (12) on the side closest to the central axis of the central hole (16) and the inner wall of the central hole (16), 0.5mm≤D thii ≤1mm.

2. The twist head mold of claim 1, wherein, The width of the twisting groove (12) along the radial direction of the twisting body (1) is W. wid W wid =T wir +D gap , among which, T wir D represents the thickness of the conductor (200) wound around the stator winding (100). gap This indicates a reserved gap, 0.2mm≤D gap ≤0.3mm.

3. The twist head mold of any of claims 1-2, wherein, The angle between the inner torsion wall (1233) and the first end face (11) is β, β=γ-φ, where γ represents the tilt angle of the torsion head of the X-Pin stator winding (100) and φ represents the over-torsion angle.

4. The twisting head mold according to claim 1, characterized in that, The outer diameter of the mounting part (14) is D. bot D bot =D equ1 D equ1 Indicates the diameter of the mounting interface of the drive unit; and / or, The axial length of the toggle body (1) is H, 35mm≤H≤50mm; and / or, The mounting part (14) has an annular centering part (17) protruding from the end face away from the winding forming working part (13); the outer diameter of the centering part (17) is D. cen D cen =D equ2 The diameter of the centering hole of the drive device is indicated; and / or, the end face of the centering part (17) away from the winding forming working part (13) is provided with a drive key (15), the cross-section of the drive key (15) is non-circular, and the width of the drive key (15) is W. dri W dri =W equ3 W equ3 The width of the drive key (15) slot of the drive device is indicated.

5. The twist head mold of claim 1, wherein, The mounting part (14) is provided with a plurality of mounting holes (141) that penetrate the twist head body (1) along its axial direction, and the plurality of mounting holes (141) are arranged at intervals along the circumference of the twist head body (1).

6. A twist head apparatus characterized by, Includes the torsion head mold as described in any one of claims 1 to 5, and a clamping device for clamping the stator core; The twisting head mold is capable of rotating along a first circumferential direction, which is the direction from the second inner sidewall (123) to the first inner sidewall (122); Alternatively, the clamping device can rotate along a second circumferential direction, which is the direction from the first inner sidewall (122) to the second inner sidewall (123); One of the twisting head mold and the clamping device is capable of moving along the axial direction of the twisting head body (1).

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